Sift dry ingredients into a large bowl, cut in butter until the mixture in the bowl resembles bread crumbs. Add the milk and vigorously mix with a knife until dough is soft. Add the cheese and ham and mix with the knife. Use your hands to knead dough a few times (can be done in the bowl but I find it easier to do on a flour dusted bench top). At this stage you can chose to place the dough on a flour dusted oven tray, mould the dough into a round shape and cut into wedges like the picture above or alternatively cut into 8-12 square pieces. If you are cutting the mix into pieces leave a 2cm space between them on the tray. Bake at 220˚C for 10-15 minutes or until an inserted skewer can be removed cleanly.